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https://www.readbyqxmd.com/read/27905059/exposure-to-secondhand-smoke-impairs-fracture-healing-in-rats
#1
Hildemberg A R Santiago, Ariane Zamarioli, Manoel D Sousa Neto, Jose B Volpon
BACKGROUND: Nonsmokers may be affected by environmental tobacco smoke (secondhand smoke), but the effects of such exposure on fracture healing have not been well studied. QUESTIONS/PURPOSES: To explore the possible effects of passive inhalation of tobacco smoke on the healing of a diaphyseal fracture in femurs of rats. We hypothesized that secondhand exposure to tobacco smoke adversely affects fracture healing. METHODS: A mid-diaphyseal fracture was created in the femur of 41 female Wistar rats and fixed with an intramedullary metallic pin; 14 rats were excluded (nine for inadequate fractures and five for K wire extrusion)...
November 30, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27901392/assessment-of-frailty-in-aged-dogs
#2
Julie Hua, Sara Hoummady, Claude Muller, Jean-Louis Pouchelon, Marc Blondot, Caroline Gilbert, Loic Desquilbet
OBJECTIVE To define a frailty-related phenotype-a clinical syndrome associated with the aging process in humans-in aged dogs and to investigate its association with time to death. ANIMALS 116 aged guide dogs. PROCEDURES Dogs underwent a clinical geriatric assessment (CGA) and were followed to either time of death or the study cutoff date. A 5-component clinical definition of a frailty phenotype was derived from clinical items included in a geriatric health evaluation scoresheet completed by veterinarians during the CGA...
December 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27901017/daily-intake-and-hazard-index-of-parabens-based-upon-24%C3%A2-h-urine-samples-of-the-german-environmental-specimen-bank-from-1995-to-2012
#3
Rebecca K Moos, Petra Apel, Christa Schröter-Kermani, Marike Kolossa-Gehring, Thomas Brüning, Holger M Koch
In recent years, exposure to parabens has become more of a concern because of evidence of ubiquitous exposure in the general population, combined with evidence of their potency as endocrine disruptors. New human metabolism data from oral exposure experiments enable us to back calculate daily paraben intakes from urinary paraben levels. We report daily intakes (DIs) for six parabens based on 660 24 h urine samples from the German Environmental Specimen Bank collected between 1995 and 2012. Median DI values ranged between 1...
November 30, 2016: Journal of Exposure Science & Environmental Epidemiology
https://www.readbyqxmd.com/read/27900353/survey-data-on-key-climate-and-environmental-drivers-of-farmers-migration-in-burkina-faso-west-africa
#4
Safiétou Sanfo, M William Fonta, Ibrahim Boubacar, P A John Lamers
This article describes two datasets generated from various sources in south western Burkina Faso to identify the key climate and environmental drivers that cause farmers to migrate. The survey sampling is random but reasoned and rational. The first dataset from 367 farm households contains data on farmers' perception of climate change risks or hazards, their impacts on farmland productivity and farm households' risk management strategies. The second dataset from 58 farm households contains data on agricultural practices, environmental changes, and environmental migration...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27898683/mortality-in-hiv-infected-alcohol-and-drug-users-in-st-petersburg-russia
#5
Nadia S Fairbairn, Alexander Y Walley, Debbie M Cheng, Emily Quinn, Carly Bridden, Christine Chaisson, Elena Blokhina, Dmitry Lioznov, Evgeny Krupitsky, Anita Raj, Jeffrey H Samet
In Russia, up to half of premature deaths are attributed to hazardous drinking. The respective roles of alcohol and drug use in premature death among people with HIV in Russia have not been described. Criminalization and stigmatization of substance use in Russia may also contribute to mortality. We explored whether alcohol, drug use and risk environment factors are associated with short-term mortality in HIV-infected Russians who use substances. Secondary analyses were conducted using prospective data collected at baseline, 6 and 12-months from HIV-infected people who use substances recruited between 2007-2010 from addiction and HIV care settings in a single urban setting of St...
2016: PloS One
https://www.readbyqxmd.com/read/27894755/dna-damage-induced-by-coal-dust-fly-and-bottom-ash-from-coal-combustion-evaluated-using-the-micronucleus-test-and-comet-assay-in-vitro
#6
Cristina Araujo Matzenbacher, Ana Letícia Hilario Garcia, Marcela Silva Dos Santos, Caroline Cardoso Nicolau, Suziane Premoli, Dione Silva Corrêa, Claudia Telles de Souza, Liana Niekraszewicz, Johnny Ferraz Dias, Tânia Valéria Delgado, Wolfgang Kalkreuth, Ivana Grivicich, Juliana da Silva
Coal mining and combustion generating huge amounts of bottom and fly ash are major causes of environmental pollution and health hazards due to the release of polycyclic aromatic hydrocarbons (PAH) and heavy metals. The Candiota coalfield in Rio Grande do Sul, is one of the largest open-cast coal mines in Brazil. The aim of this study was to evaluate genotoxic and mutagenic effects of coal, bottom ash and fly ash samples from Candiota with the comet assay (alkaline and modified version) and micronucleus test using the lung fibroblast cell line (V79)...
November 22, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27894685/dna-damage-induced-by-occupational-and-environmental-exposure-to-miscellaneous-chemicals
#7
REVIEW
Juliana da Silva
Epidemiological studies for hazardous situations resulting from the risk of environmental and/or occupational exposure to miscellaneous chemicals present several difficulties. Biomonitoring of human populations can provide an early detection system for the initiation of cell dysregulation in the development of cancer, which would help develop an efficient prevention program. Recently, the cytokinesis-block micronucleus (CBMN) assay in lymphocyte cells has become an important tool for assessing DNA damage in exposed populations...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27894224/comparative-study-of-preparation-of-hazardous-drugs-with-different-closed-system-drug-transfer-devices-by-means-of-simulation-with-fluorescein
#8
Eva González-Haba Peña, Silvia Manrique Rodríguez, Ana Mª Herranz Alonso, Patricia Pérez Castán, Mónica Moreno Gálvez, Irene Iglesias Peinado, María Sanjurjo Saez
OBJECTIVES: The level of environmental contamination generated during preparation and administration of hazardous drugs using different valve closed-systems and their combinations was compared. The actual impact on the overall time of preparation of cytostatics and the economic cost of the different modalities were also compared. METHODS: Comparative study of the preparation of fluorescein mixtures with different modalities of valve closed-system combinations. Environmental contamination was detected in critical points of connection, and in splashes produced at any other points...
November 1, 2016: Farmacia Hospitalaria
https://www.readbyqxmd.com/read/27894055/indirect-effects-of-climate-changes-on-cadmium-bioavailability-and-biological-effects-in-the-mediterranean-mussel-mytilus-galloprovincialis
#9
Alessandro Nardi, Luana Fiorella Mincarelli, Maura Benedetti, Daniele Fattorini, Giuseppe d'Errico, Francesco Regoli
Despite the great interest in the consequences of climate change on the physiological functioning of marine organisms, indirect and interactive effects of rising temperature and pCO2 on bioaccumulation and responsiveness to environmental pollutants are still poorly explored, particularly in terms of cellular mechanisms. According to future projections of temperature and pH/pCO2, this study investigated the main cellular pathways involved in metal detoxification and oxidative homeostasis in Mediterranean mussels, Mytilus galloprovincialis, exposed for 4 weeks to various combinations of two levels of pH/pCO2 (8...
November 25, 2016: Chemosphere
https://www.readbyqxmd.com/read/27892521/a-novel-bio-engineering-approach-to-generate-an-eminent-surface-functionalized-template-for-selective-detection-of-female-sex-pheromone-of-helicoverpa-armigera
#10
Parikshit Moitra, Deepa Bhagat, Rudra Pratap, Santanu Bhattacharya
Plant pests exert serious effects on food production due to which the global crop yields are reduced by ~20-40 percent per year. Hence to meet the world's food needs, loses of food due to crop pests must be reduced. Herein the silicon dioxide based MEMS devices are covalently functionalized for robust and efficient optical sensing of the female sex pheromones of the pests like Helicoverpa armigera for the first time in literature. The functionalized devices are also capable of selectively measuring the concentration of this pheromone at femtogram level which is much below the concentration of pheromone at the time of pest infestation in an agricultural field...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27889660/the-ph-dependent-leaching-behavior-of-slags-from-various-stages-of-a-copper-smelting-process-environmental-implications
#11
Alice Jarošíková, Vojtěch Ettler, Martin Mihaljevič, Bohdan Kříbek, Ben Mapani
The leaching behaviors of primary copper (Cu) slags originating from Ausmelt, reverbatory, and converter furnaces operating under a single technological process were compared to a residual slag tailing obtained by slag re-processing via flotation and metal recovery. The EN 12457-2 leaching test, used for assessment of the hazardous properties, was followed by the CEN/TS 14997 pH-static leaching test (pH range 3-12). Both leaching experiments were coupled with a mineralogical investigation of the primary and secondary phases as well as geochemical modeling...
November 24, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27889512/genotoxicity-and-growth-inhibition-effects-of-aniline-on-wheat
#12
Nan Tao, Guanyi Liu, Lu Bai, Lu Tang, Changhong Guo
Aniline is a synthetic compound widely used in industrial and pesticide production, which can lead to environmental pollution. Its high concentration in rivers and lakes is hazardous to aquatic species. Although the mechanism of aniline toxicity has been studied extensively in animals and algae, little is known about its genotoxicity in plants. In this study, we investigated the genotoxicity effects of aniline on wheat root tip cells. The mitotic index of wheat root tip cells decreased when the aniline test concentration was higher than 10 mg L(-1)...
November 24, 2016: Chemosphere
https://www.readbyqxmd.com/read/27889215/benzotriazole-type-ultraviolet-stabilizers-and-antioxidants-in-plastic-marine-debris-and-their-new-products
#13
Manviri Rani, Won Joon Shim, Gi Myung Han, Mi Jang, Young Kyoung Song, Sang Hee Hong
Ultraviolet stabilizers (UVSs) and antioxidants are the most widely used additives in plastics to enhance the lifetime of polymeric materials. There is growing interest in the roles of plastic marine debris and microplastics as source or vector of toxic substances to marine environment and organisms. However, there is limited information available on plastic associated chemicals, particularly additive chemicals. Therefore, to evaluate their extent of exposure from plastics to the marine environment, we determined UVSs and antioxidants in plastic debris (n=29) collected from beaches along with their corresponding new plastic products in markets (n=27) belonging to food, fisheries, and general use...
November 23, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27889159/exposure-to-minimally-processed-pear-and-melon-during-shelf-life-could-modify-the-pathogenic-potential-of-listeria-monocytogenes
#14
Pilar Colás-Medà, Inmaculada Viñas, Márcia Oliveira, Marina Anguera, Jose C E Serrano, Maribel Abadias
Survival and virulence of foodborne pathogens can be influenced by environmental factors such as the intrinsic properties of food as well as the extrinsic properties that contribute to food shelf life (e.g., temperature and gas atmosphere). The direct contribution of food matrix characteristics on the survival of L. monocytogenes during fresh-cut fruit shelf life is not very well understood. In addition, the gastrointestinal tract is the primary route of listeriosis infection and penetration of the intestinal epithelial cell barrier is the first step in the infection process...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27887973/decommissioning-strategy-for-liquid-low-level-radioactive-waste-surface-storage-water-reservoir
#15
S S Utkin, I I Linge
The Techa Cascade of water reservoirs (TCR) is one of the most environmentally challenging facilities resulted from FSUE "PA "Mayak" operations. Its reservoirs hold over 360 mln m(3) of liquid radioactive waste with a total activity of some 5 × 10(15) Bq. A set of actions implemented under a special State program involving the development of a strategic plan aimed at complete elimination of TCR challenges (Strategic Master-Plan for the Techa Cascade of water reservoirs) resulted in considerable reduction of potential hazards associated with this facility...
November 22, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27886528/neighborhood-social-stressors-fine-particulate-matter-air-pollution-and-cognitive-function-among-older-u-s-adults
#16
Jennifer Ailshire, Amelia Karraker, Philippa Clarke
A growing number of studies have found a link between outdoor air pollution and cognitive function among older adults. Psychosocial stress is considered an important factor determining differential susceptibility to environmental hazards and older adults living in stressful neighborhoods may be particularly vulnerable to the adverse health effects of exposure to hazards such as air pollution. The objective of this study is to determine if neighborhood social stress amplifies the association between fine particulate matter air pollution (PM2...
November 14, 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/27883231/evaluating-the-credibility-of-histopathology-data-in-environmental-endocrine-toxicity-studies
#17
REVIEW
Jeffrey C Wolf, Gerd Maack
Agencies responsible for environmental protection are tasked with developing regulatory guidance that is based on the best available scientific evidence. Histopathology is a common endpoint in toxicologic bioassays; however, because of the subjective nature of this endpoint, and the advanced level of specialized training required for its effective utilization, the reliability of histopathology data can be inconsistent. Consequently, mechanisms for evaluating such data on a case-by-case basis are needed. The purposes of this review are to describe a methodology that can be used to evaluate the credibility of histopathology findings, and discuss the results of such assessments as applied to real-world data collected from the scientific literature...
November 24, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27878546/investigation-of-antibiotics-in-health-care-wastewater-in-ho-chi-minh-city-vietnam
#18
Thi-Dieu-Hien Vo, Xuan-Thanh Bui, Ngoc-Dan-Thanh Cao, Vinh-Phuc Luu, Thanh-Tin Nguyen, Bao-Trong Dang, Minh-Quan Thai, Dinh-Duc Nguyen, Thanh-Son Nguyen, Quoc-Tuc Dinh, Thanh-Son Dao
Hospital wastewater contains huge amounts of hazardous pollutants which are being discharged daily to environment with or without treatment. Antibiotics were among the important group of pharmaceuticals considered as a potential source of health risk for human and other living creatures. Although the investigations about the existence of antibiotics in hospital wastewater have gained concern for researchers in many countries, there is only one research conducted in Hanoi-Vietnam. Hence, in this study, investigations have been done to fulfill the requirement of real situation in Vietnam by accomplishing survey for 39 health care facilities in Ho Chi Minh City...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27877848/towards-sensible-toxicity-testing-for-nanomaterials-proposal-for-the-specification-of-test-design
#19
Annegret Potthoff, Mirco Weil, Tobias Meißner, Dana Kühnel
During the last decade, nanomaterials (NM) were extensively tested for potential harmful effects towards humans and environmental organisms. However, a sound hazard assessment was so far hampered by uncertainties and a low comparability of test results. The reason for the low comparability is a high variation in the (1) type of NM tested with regard to raw material, size and shape and (2) procedures before and during the toxicity testing. This calls for tailored, nanomaterial-specific protocols. Here, a structured approach is proposed, intended to lead to test protocols not only tailored to specific types of nanomaterials, but also to respective test system for toxicity testing...
December 2015: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27875717/comparative-study-on-the-mobility-and-speciation-of-heavy-metals-in-ashes-from-co-combustion-of-sewage-sludge-dredged-sludge-and-rice-husk
#20
Teng Wang, Yongjie Xue, Min Zhou, Yunjuan Yuan, Suyun Zhao, Gang Tan, Xian Zhou, Junjun Geng, Shaopeng Wu, Haobo Hou
The co-combustion of sludge (sewage and dredged sludge) with rice husk is expected to become a trend because of its economic and environmental benefits. However, the massive residues from the co-combustion process and the mobility of heavy metals (HMs) warrant special attention. The basic performance and environmental properties of the trace elements (Cr, Cu, Fe, Mn, Ba and Zn) from the co-combustion ashes were studied to promote the further utilization of these materials. These ashes have a shell particle shape, high specific area, high amorphous content and low crystalline phase content...
November 19, 2016: Chemosphere
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